Table 3.

Comparison of results from matched dosimetry and area measurements overall, by mill, and by operation, location, and job title within mill

			Bias (Mean dosimetry LEX,8h − mean 60-sec area LEQ) (dB)
Grouping variable			n	Mean	SD	Minimum	Maximum	% ≤5 dBA bias
Overall			209	1.5	5.5	−16.0	14.8
	Mill		162	1.3	5.3	−15.9	11.4	35.7
	Operation		131	1.9	4.8	−12.5	14.0	20.4
	Location		92	1.1	6.3	−15.0	14.8	22.2
	Job title		94	2.1	4.2	12.5	13.3	48.0
	1		75	0.04	5.9	−16.0	11.3	48.0
		Operation	60	0.3	4.8	−12.5	9.7	42.5
		Location	49	−0.4	7.4	15.0	14.8	29.9
		Job title	50	1.6	4.1	−12.5	9.7	33.9
	3		36	2.7	4.1	−5.1	10.4	31.5
		Operation	33	2.1	4.9	−7.1	14.0	34.3
		Location	21	−0.3	2.4	−5.2	4.1	28.8
		Job title	21	−0.2	3.6	−7.1	10.4	27.4
	4		51	2.4	4.9	−7.1	11.0	40.7
		Operation	38	4.3	3.8	−3.8	13.3	25.6
		Location	22	5.8	3.0	2.2	13.9	10.4
		Job title	23	5.4	2.9	1.6	13.3	12.8

Area measurements not available at facility 2